I have a question regarding purchasing a new SDHC 32 gig memory card. Should it be class 10,6,4 or 2 or does it even matter other than class 10 is faster? And what is with the advertisement of Dual boot.is this advantageous? Will I still have access to everything On my Nook Color or will I have to remove the card to get into certain items already loaded on the Nook Color?. Will it actually boot into the alternate OS without prompting or can I get it set up to throw up a boot option menu before it chooses for me? What is the recommended class of memory?

Hmmm, you're posting this in the Nook Tablet Forum and I guess you have a Nook Color. As for the speed, class 4 should be fine for the Nook Yes, it will boot into Android without prompting and do everything the stock Nook will do and more. It won't affect your original files at all and if you power off, pull the card and reboot, you'll be looking at the stock Nook just like it came out of the box. That way, your warranty won't be affected.

The NT user guide says "...Class 6 microSDHC cards are supported..." which I think means Class 10 are not. I could be wrong. Has anybody tried a Class 10?

It would be my preference to puchase a Class 10 card, but I'm hesitant to make the investment until I receive confimation that the current NT is designed to support it (or will in the near future). Most of the ones that I'm finding are either 4 or 10 and it would be my preference to opt to purchase the faster option available today.

Is this something that someone from B&N could confirm for us in the forum?

Charlene and I both have Class 10 cards, one Tablet and one Color. Both operate without problems. SD cards are tested then rated at one class below their "unstable" test rate. So, a Class 10 card simply operated on the test bench at the highest I/O frequency. If your device does not need the faster speed it just does not use it. My opinion is that a person should by Class 10 because the cost differential between it and lower class cards is low and it is the most reliable. Yes, I understand lower classed cards are also reliable; I said MOST reliable.